美国世界观察所所长莱斯特·布朗曾提出“２１世纪谁来养活中国人”的质疑。布朗的观点虽然明显带有偏见，但是，我国农业生产确实存在不少令人担忧的问题：我国人均耕地面积甚少，耕地的“负担”十分沉重，再加上，土壤沙漠化、水土流失、盐碱化日益严重，使耕地面积逐步减少 Lester Brown, director of the United States World Watch, raised the question of “who will feed the Chinese in the 21st century.” Brown’s point of view is obviously biased. However, there are quite a few worrisome problems in agricultural production in our country. Per capita arable land in our country is very small, and the “burden” of arable land is very heavy. In addition, the soil desertification, soil erosion, salt Alkalization is becoming increasingly serious, so that the area of ​​cultivated land gradually reduced